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On divided roadways, cross-median fatalities are disproportionately overrepresented in fatal and serious injury crashes. Many state DOTs sought to mitigate cross-median crash risk by installing cable median barriers. Despite increased crash rates, studies evaluating crash rates before and after cable median barriers were installed indicated excellent improvement in overall safety. Nonetheless, cable barriers can also contribute to serious injury and fatality crashes which would not have otherwise occurred, including penetration and rollover crashes. A study was conducted to evaluate the conditions associated with severe cable median barrier crashes. While average penetration and rollover rates were 9.3 and 5.1%, respectively, penetration rates for passenger cars exceeded 15%, while rollover rates for pickups and SUVs was approximately 13%. Generally, vehicles with low bumper heights, high CG heights, and higher masses were involved in statistically significantly more cable median barrier penetrations. CG trajectory angles leading up to impact with the barriers were analyzed, and the 85th percentile trajectory angle associated with severe cable median barrier crashes was 39 degrees. Additional factors contributing to cable median barrier penetrations and rollovers were identified and summarized, and updates to cable barrier crash tests were recommended to improve system performance.

This report provides technical guidelines for evaluatingenvironmental dredging as a sediment remedy component. This documentsupports the Contaminated Sediment Remediation Guidance forHazardous Waste Sites, released by the U.S. Environmental Protectio...

The report describes the annual total cost of metallic corrosion in the United States and preventive strategies for optimum corrosion management. In 1998, an amendment for a Cost of Corrosion study was included in the Transportation Equity Act for th...

Drilled shaft foundations are principally used to support many structures such as bridge piers, towers,buildings, transmission towers, and roadway cable barriers. This research focuses on the use of drilled shaftsin the cable median barrier systems w...

The objective of this study is to provide information detailing the safety consideration specifications for thetruck only and passenger only facilities for I-70 and I-44. The categories discussed in this report include:Traffic Operation and Truck Onl...